Usually, it is very wrong to drain the sewer.

First, it drains the odor from the sewer, which seriously affects the surrounding area.

secondly, after the rain, the sewer is completely blocked with mud, so the smoke exhaust is naturally poor. And strict requirements for fan wind are very high.

it is suggested to change the pipeline to high or straight exhaust, install an oil fume purifier, and at the same time make money, we should consider polluting the surrounding area.

please refer to minhong environmental protection technical support for the specific installation diagram.